单选题You must have stayed up late last night, _____?Amustn’t youBdon’t youCdidn’t youDneedn’t you

单选题
You must have stayed up late last night, _____?
A

mustn’t you

B

don’t you

C

didn’t you

D

needn’t you

参考解析

解析：
当陈述部分出现must have done时，若强调对过去情况的推测（一般有过去时间状语），反意疑问部分的谓语动词用didn’t+主语；若前句强调动作的完成，疑问部分谓语动词用haven’t/ hasn’t+主语。本句有明显的时间状语last night，故选C。

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